Dynamic modeling of plasma-vapor interactions during plasma disruptions

Conference · Fri May 01 04:00:00 EDT 1992

OSTI ID:10155013

Hassanein, A; Ehst, D A

Intense deposition of energy in short times on fusion reactor components during a plasma disruption may cause severe surface erosion due to ablation of these components. The exact amount of the eroded material is very important to the reactor design and its lifetime. During the plasma deposition, the vaporized wall material will interact with the incoming plasma particles and may shield the rest of the wall from damage. The vapor shielding may then prolong the lifetime of these components and increase the reactor duty cycle. To correctly evaluate the impact of vapor shielding effect a comprehensive model is developed. In this model the dynamic slowing down of the plasma particles, both ions and electrons, with the eroded wall material is established. Different interaction processes between the plasma particles and the ablated material is included. The generated photons radiation source and the transport of this radiation through the vapor to the wall is modeled. Recent experimental data on disruptions is analyzed and compared with model predictions. Vapor shielding may be effective in reducing the overall erosion rate for certain plasma disruption parameters and conditions.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 10155013
• Report Number(s): ANL/CP--74880; CONF-920311--18; ON: DE92016183
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700420
DESIGN
EROSION
FIRST WALL
PLASMA DISRUPTION
PLASMA-FACING COMPONENTS
RADIATION TRANSPORT
SHIELDING
STOPPING POWER
THERMONUCLEAR REACTOR MATERIALS
VAPORS